摘要
柴油机气缸盖承受机械载荷和热载荷双重作用,在气缸盖中喷油器孔与气门座孔之间的鼻梁区工作温度最高,应力更为集中,对气缸盖变形和裂纹影响较大。针对这一现象,以385T柴油机为研究对象,利用Pro/Engineer对气缸盖、压板、压板螺栓和喷油器等相关部件建立三维模型,并利用ANSYS有限元软件对喷油器孔的受力面在不同设计方案情况下进行比较分析。研究分析表明,通过更改喷油器孔处受力面结构,并配套增加铜垫片和调整喷油器压板装配位置,可以有效减小喷油器孔处受力面应力集中。
The cylinder head of the diesel engine is subjected to both mechanical and thermal loads,the working temperature is the highest in the nose area between the injector hole and the valve seat hole in the cylinder cap,the stress is more concentrated,and the deformation and crack of the cylinder head are greatly affected.In view of this phenomenon,a three-dimensional model of cylinder head,pressure plate,pressure plate bolt and injector is established by Pro/Engineer for 385 T diesel engine,and the stress surface of injector hole is compared and analyzed under different design schemes by ANSYS finite element software.The analysis shows that the stress concentration of the pressure surface of the injector hole can be reduced effectively by changing the structure of the pressure surface of the injector hole and supporting the increase of the copper gasket and adjusting the assembly position of the injector plate.
作者
谢永东
何志刚
许广举
Xie Yongdong;He Zhigang;Xu Guangju(Suzhou Institute of Construction&Communications,Jiangsu Union Technical Institute,Suzhou,Jiangsu,215000,China;College of Automobile and Traffic Engineering,Jiangsu University;College of Automotive Engineering,Changshu Institute of Technology)
出处
《小型内燃机与车辆技术》
2019年第6期38-43,共6页
Small Internal Combustion Engine and Vehicle Technique
基金
江苏省自然科学青年基金项目（BK20160406）
江苏省“333工程”科研资助立项项目（BRA2016064）
关键词
气缸盖
喷油器孔
有限元分析
优化设计
Cylinder head
Injector hole
Finite element analysis
Optimization design
